Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbbefe0bed46749…

MALICIOUS

PDF

87.1 KB Created: 2021-07-18 18:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 03ba0dad9b585fb2198d64f474868f54 SHA-1: c7adcb4f23408500eb36be5abf6e6b0cab2561a6 SHA-256: 3cbbefe0bed46749d408710b943a5c288f15e08beefa9881e3613dc2ebbddbc0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is `https://feedproxy.google.com/~r/sq/ugae/~3/J-SxIuB37Ms/square?utm_term=crystal+soul+spear+ds3`, suggesting a phishing or malware distribution lure. No scripts were extracted, but the PDF structure and heuristics point towards an attempt to exploit user interaction via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://feedproxy.google.com/~r/sq/ugae/~3/J-SxIuB37Ms/square?utm_term=crystal+soul+spear+ds3
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e92f1d563c1506a8b6a472/1625894685725/33615368507.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee5b69fb3cc800db576d79/1626233705280/davukib.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f07731d54ecf6408d8e049/1626371889157/19715564129.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f364.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF364 16792 bytes
font_01_sfnt_off00010b76.bin
4cc8ef84220b3e4388c848238da054ea67d559c8ec664291fb350e49c8a30379		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B76 16780 bytes
font_02_sfnt_off00013737.bin
122df1fb2ac2e3d76b3f86e8ceeebd94f92a253805c00717e5348c1d155883d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13737 10604 bytes

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